NATIONAL FUEL GAS CODE EXAM REAL EXAM QUESTIONS WITH ALL CORRECT ANSWERS 2025 NEW UPDATE A+ PASS

NATIONAL FUEL GAS CODE EXAM REAL
EXAM QUESTIONS WITH ALL CORRECT
ANSWERS 2025 NEW UPDATE A+ PASS
The maximum operating pressure shall be ________ psi. - CORRECT
ANSWER>>>>125

The term "shall" indicates what? - CORRECT ANSWER>>>>mandatory requirement

Define a Category I Vented Appliance. - CORRECT ANSWER>>>>nonpositive vent,
non condensate

Define a Category II Vented Appliance. - CORRECT ANSWER>>>>nonpositive vent,
condensate

Define a Category III Vented Appliance. - CORRECT ANSWER>>>>positive vent, non
condensate

Define a Category IV Vented Appliance. - CORRECT ANSWER>>>>positive vent,
condensate

Define a Low Pressure Boiler. - CORRECT ANSWER>>>>Generates steam not in
excess of 15 psi, with a maximum temperate of 250 degrees.

Define British Thermal Unit (Btu) - CORRECT ANSWER>>>>the quantity of heat
required to raise the temperature of 1 pound of water 1 degree (1055 joules)

Define a Burner. - CORRECT ANSWER>>>>A device for the final conveyance of gas,
or a mixture of gas and air, to the combustion zone.

Define a Type 1 and 2 Clothes Dryer. - CORRECT ANSWER>>>>Family, Public

Define Condensate (Condensation) - CORRECT ANSWER>>>>Liquid that separates
from a gas due to a reduction in temperature or an increase in pressure

Define a Cubic Foot of Gas. - CORRECT ANSWER>>>>The amount of gas that
occupies 1 ft cubed at 60 degrees.

Define Draft - CORRECT ANSWER>>>>A pressure difference that causes gas or air to
flow through a chimney, vent, flue or appliance

Define a Mechanical Draft - CORRECT ANSWER>>>>Draft produced by a fan or an air
of steam jet

, Define a Natural Draft - CORRECT ANSWER>>>>Draft produced by the difference in
the weight of a column of flue gases within a chimney or vent

Define a Draft Hood - CORRECT ANSWER>>>>A nonadjustable device built into an
appliance or made a part of the vent connector from an appliance

Define a Flue Collar - CORRECT ANSWER>>>>The portion of an appliance designed
for the attachment of a draft hood, vent connector or venting system.

Define a Pressure Relief Valve - CORRECT ANSWER>>>>A valve that automatically
opens and closes a relief vent, depending on whether the pressure is above or below a
predetermined value.

Define a Vacuum Relief Valve - CORRECT ANSWER>>>>A valve that automatically
opens and closes a vent for relieving a vacuum within the hot water supply system,
depending on whether the vacuum is above or below a predetermined value.

Define a Common Vent - CORRECT ANSWER>>>>That portion of a vent or chimney
system that conveys products of combustion from more than one appliance

Define a Gas Vent - CORRECT ANSWER>>>>Designed for conveying vent gases from
appliances or their vent connectors to the outdoors

Define a Vent Connector - CORRECT ANSWER>>>>The pipe or duct that connects a
fuel gas burning appliance to a vent or chimney

When adding appliances to a gas system, the existing piping shall be checked to
determine whether it has _____________ _______________. - CORRECT
ANSWER>>>>Adequate capacity

LP Gas Systems are designed to operate below __________ degrees? - CORRECT
ANSWER>>>>-5 F (-21 C)

Copper and Brass shall not be used if the gas contains more than an average of
_________ grains of hydrogen sulfide per _________ scf of gas. - CORRECT
ANSWER>>>>0.3, 100

List four types of pipe joints. - CORRECT ANSWER>>>>threaded, flanged, brazed or
welded

Where _________ psi steel flanges are bolted to Class 125 cast iron flanges, the raised
face on the steel flange shall be ________________. - CORRECT ANSWER>>>>150,
removed